Tobacco pipe reamer



May 26, 1931. F. KREKELER TOBACCO PIPE REAMER Filed- May l, 1928 ATTORN EY Patented May 26, 1931 UNITED STATES PATENT OFFICE FREDERICK KREKELER, OF WOODSIDE, NEW' YORK TOBACCO PIPE BEAMER Application flied May i, 192s. serial No. 274,181.

This invention relates to improvements in tobacco pipe reainers.

One of the objects of this invention is to provide a tobacco pipe reamer having an autoniatic expanding movement which is defimounted thereon a cutter or cutters automatically movable toward the opposite side of the pipe bowl and is preferably so movable by contact with the interior surface of the bowl to positions parallel with the initial position thereof.

Another object of the invention is to provide a tobacco pipe reamer WhichlWill avoid the usual chattering of the tool during reaming operation and to that end I provide a three-edge contact with the internal walls of the surface being reamed.

Another object of the invention is to produce a simplified construction of pipe reamer embodying an operating member comprising a handle and a blade having a contact edge adapted to engage the bowl of the pipe at one side thereof, and a movable cutting element or elements mounted on said blade and guided to have a guided movement bodily toward the opposite side of the pipe bowl in a plane parallel to said blade and preferably into positions causing the edge or edges of said cutting elements to extend parallel to that position rst assumed.

till another object of my invention is, in a device of the character specified, to provide the cutting edges with notches arranged in staggered relationship to each other.

With these and other objects in view, the invention comprises the combination of niembers and arrangement of parts so combined as to co-act and cooperate with each other in the performance of the functions and the accomplishment of the results herein contemplated, and comprises in one of its adaptations the species or preferred form illustrated in the accompanying drawings, in Which:-

Fig. l is a side elevation of my improved tobacco pipe reamer illustrated in contracted or unexpanded position within the bowl of a .smoking pipe shown in section;

Fig. 2 is a side elevation removed from the pipe with the parts in expanded positions;

Fig. 3 is a section on the line 3 3 of Fig. l, showing the parts in contracted or unexpaiided positions;

Fig. 4L is a device similar to Fig. 3, showing the parts of the device in expanded positions;

Fig. 5 is a disassembled View, iii perspective, showing the three parts of the device separated; and

Fig. 6 is an elevation of one edge or end of the device.

Referring now to these drawings, which Villustrate a preferred embodiment of my in- 2"- vention, my improved tobacco pipe reamer comprises a suitable operating member l0 preferably comprising a` single flat piece of metal formed to provide a handle portion l0 and a blade portion 10?* extending within and contacting at one edge with the interior of the bowl of the pipe. The blade portion 10"L is, as illustrated, provided With a plurality and, as shown, a pair of inclined pai'- allel slots 1l preferably extending upwardly toward the `opposite non-contacting edge of said blade. l

In the preferred embodiment of my invention shown, I mount on the blade portion lO"L by means of rivets 13 a pair of cutters l2, 12 which are connected together by the rivets through said inclined parallel slots 1l, it being understood that the rivets extend through holes 13 in the cutters and are headed against opposite faces of such cutters. It will be seen that when cutters are so mounted in the parallel inclined slots 11, the two cutters connected together will be movable as a unit in a direction opposite to said contact edge and in a plane parallel to the face of the blade. Because of the parallel position of the slots, the cutters will move bodily toward the side of the pipe bovvl opposite to that engaged by the blade 10aL and the edges thereof Will be maintained in positions parallel to the posip1 ou tions first assumed thereby. In the preferred embodiment illustrated, the cutters comprise slide portions l2, 12" extending parallel to the blade lOrl and cutting-edge portions l2, 12d extending at angles thereto in opposite directions. I thus provide for a definite predetermined eXpanding movement and sulficient expansion will take place by frictional engagement of the edge of the cutters with the walls of the pipe bowl or the surface incrustations thereon to enable a thorough reaming thereof. It will be seen also that when two of such cutters are so mounted and connected and moved together in a guided expansion movement, the reaming tool will at all times have a three-edge contact with the walls of the pipe bowl or the incrustations thereon, and this three-edge contact will prevent a chattering of the tool during a cutting movement thereof within the pipe.

The cuttinO` ed 0Ves of the cutters 1Q l2 are,

provided with notches 14 positioned in staggered relationship to each. other, so that upon a downward rotating movement, the edge portions between the notches will contact at varying places with the incrustations upon the wall of the bowl and thus result in a better cutting action of the tool.

From the above, it will be noted that the movement of the cutters, in expanding, will take place due to the frictional engagement of the edge of the cutters with the wall upon insertion and pressure movement of the device into the bowl, and that so soon as a portion of the incrustation is cut away, the cutters will automatically expand or increase in area se as to increase the cutting area until the incrustations are all eut away or until the limit of expansion of the device has been reached. This expansion movement in guided relationship to the contacting edge of the blade l0a of the handle is an important item in the operation of my improved device. The use of a centrally-disposed operating member with cutting elements on opposite sides thereof enables the inclined slots in the operating member to be substantially closed so as to prevent the entrance of dust and dirt therein. It will be understood that, in the preferred embodiment of my invention, the expanding movement in my device is completely automatic; that the device may, therefore, be operated with one hand without diiiiculty, while holding the bowl of the pipe with the other hand; also that the device is capable of reaming pipe bowls of varying diameters within the limits of expansion movement thereof, and that the edges of the cutters are, in their expanding movement, maintained in substantially parallel relationship to positions first assumed.

It will also be noted that my reamer first engages the wall of the bowl of the pipe adjacent to the upper edge thereof and cuts downwardly upon a downward pressure toward the bottom of the bowl while at the same time having an expanding movement.

Having described my invention, I claim z* l. A tobacco pipe reamer embodying, in combination, an operating member having a blade portion extensible within the bowl of the pipe and provided with a plurality of slots arranged in parallel relationship, and a cutting element mounted in said parallel slots to have a guided, automatic movement bodily in relation to said blade, said cuttingr element and blade portion being arranged, upon insertion of the reamer into the pipe, to cause the said cutting element to engage the wall of the pipe adjacent to the outer edge of the bowl and to cause an expansion of the two elements during an inward boring movement of the reamer.

Q. A. tobacco pipe reamer embodying, in combination, an operating member having a blade portion extensible within the bowl of the pipe and provided with an edge adapted to Contact with the interior of the bowl of the pipe at one side and also having a plurality of slots arranged in parallel relationship, a cutting element comprising a pair of cutters connected together through said parallel slots and movable into engagement with the opposite side of said pipe bowl, said cutting elcment and blade portion extending, when in unexpended condition, to substantially similar planes at the lower end of the said reamer, and said cutting element having inclined tapering edges arranged, on insertion of the reamer into the pipe, to engage the wall of the pipe adjacent to the outer edge thereof and to expand during an inward boring movement of said reamer.

In witness whereof, I have signed my name to the foregoing specification.

FREDERICK KREKELER. 

